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UNITED STATES PATRICK B. DELANY,

OF NEW YORK, N. Y.

ELECTRICAL CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 283,764, dated August28, 1883.

Application filed May 10, 1883.

To all whom it may concern.-

Be it known that I, PATRICK B. DELANY, a citizen of the United States,residing in the city, county, and State of New York, haveinvented anImproved Electrical Conductor, of which the following is aspecification.

My invention relates to that class of conductors in which a metal ofhigh conductivity is used in connection with a metallic conductor ofless electrical capacity, but capable of enduring the tensile strain towhich telegraphic conductors are necessarily subjected.

Heretofore iron. steel, and perhaps other electrical conductors, havebeen coated with a deposit of copper. While such a method ormanufacturegives the desired conductivity, in handling the wire thecopper coating is liable to crack and perhaps to scale off. It has alsobeen proposed heretofore to wrap an iron or steel core with a copperribbon, and then to coat it with tin by immersing or passing it througha bath. Such a method of manufacture is, however, objectionable for thereason that the contact between the overlapping edges of the copperribbon is liable to become impaired, and in handling the conductor theribbon may spring or become loosened fromthe iron or steel core. I

The object of my invention is to obviate these difficulties, and toproduce a compound electrical conductor which may be manipulated withperfect freedom without fear of injury to it.

In the accompanying drawings, Figure l is a view, partly broken away, ofasection of my improved conductor. Fig. 2 is a transverse sectiontherethrough, and Fig. 3 is also atransverse section of a conductorwithout an insulating-coating.

I take an iron, steel, phosphor-bronze, or other core, a, capable ofenduring the tensile strain and manipulation to which it may besubjected, and braid or otherwise form around it an envelope or sheath,b, of comparatively fine wire of small resistance, such as copper. Thisbraiding may be like the fibrous insulating-braiding of the ordinaryinsulated wire, and may be done by any of the ordinary braiding-machinesadapted for that purpose. The conductor thus formed may, if desired, becoated withtin, lead,.or zinc, 0, or other suit- (No model.)

able metal or alloy of either high or low resistance, as may be thoughtbest, by subjecting it ble to break, crack, or separate from the core.

Ihave said fine copper wire, as that is best adapted for the purpose;but the size of the wire may be varied within wide limits. The conductormay be covered with a coating of insulating compound, as illustrated inFigs. 1 and 2.

I claim as my invention 1. A compound electrical conductor, consisting.of the combination of a strain-wire conductor of high tensilestrength-and capable of enduring the necessary strains, and an envelope,sheath, or covering composed of comparatively fine wire of relativelylow resistance.

2. The combination, substantially as set forth, of a strainwire ofrequisite tensile strength, and an envelope, sheath, or cover ing ofcopper wire braided thereon.

3. An electrical conductor consisting of a central wire or conductorhaving braided thereon a sheath of comparatively fine wire of relativelylow resistance.

4. The compound electrical conductorherein described, consisting of thecombination of the strain-wire or central core of requisite tensilestrength, a sheath of relatively fine copper wirebraided thereon, and anouter coating of insulating material.

5. A compound electrical conductor, consisting of a strain-wire, itsenvelope or sheath composed of fine copper wire, and an outside coatingof metal, substantially as set forth.

In testimony whereof I have hereunto subscribed my name this 7th day ofMay, A. D. 1883.

PATRICK B. DELANY.

fitness es FRANK W. J ONES, FEEDK. P. J oNEs.

